CN114813745A - Tab folding detection method, device and system, electronic equipment and storage medium - Google Patents
Tab folding detection method, device and system, electronic equipment and storage medium Download PDFInfo
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/9515—Objects of complex shape, e.g. examined with use of a surface follower device
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- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
- G06T7/0008—Industrial image inspection checking presence/absence
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Abstract
The application relates to a tab folding detection method, a tab folding detection device, a tab folding detection system, electronic equipment and a storage medium, wherein the method comprises the following steps: acquiring a shot image, wherein the shot image is obtained by shooting a pole piece and a pole lug under the irradiation of a laser generator; extracting the laser pattern in the shot image to obtain an actual laser pattern parameter; and determining whether the tab is folded or not according to the actual laser pattern parameters. Through the application, the lug folding detection can be carried out on the whole battery cell under the condition that the lug folding detection is not influenced by illumination, and the detection result and the efficiency homoenergetic of the ambient light in the backlight or the light direction can be greatly improved.
Description
Technical Field
The present application relates to the field of computer technologies, and in particular, to a tab folding detection method, apparatus, system, electronic device, and storage medium.
Background
In order to ensure the quality of the battery core, the tab folding detection is of great importance in all core making equipment. In the prior art, tab detection is usually required in a given Region Of Interest (ROI) according to an image gray value, but the detection efficiency is low, and the detection effect in the prior art is easily affected by illumination conditions, and has a certain effect under backlight conditions, but the folding cannot be detected due to tab reflection under light conditions.
Disclosure of Invention
The application provides a tab folding detection method, a tab folding detection device, a tab folding detection system, an electronic device and a storage medium, and whether a tab is in a folding state or not can be judged by analyzing acquired data, so that the problems that in the prior art, tab folding detection efficiency is low and detection effect is easily influenced by illumination are solved.
The technical scheme of the application is as follows:
according to a first aspect of the embodiments of the present application, there is provided a tab folding detection method, including: acquiring a shot image, wherein the shot image is obtained by shooting a pole piece and a pole lug under the irradiation of a laser generator; extracting the laser pattern in the shot image to obtain an actual laser pattern parameter; and determining whether the tab is folded or not according to the actual laser pattern parameters.
Further, the determining whether the tab is folded according to the actual laser pattern parameter includes: acquiring preset standard laser parameters; and determining whether the tab is folded or not according to the comparison result of the actual laser pattern parameter and the standard laser parameter.
Further, the actual laser pattern parameters include at least one of: the standard laser parameters at least comprise one of the following parameters: the length of a standard laser line and the distance between standard laser intermediate faults; correspondingly, the determining whether the tab is folded according to the comparison result between the actual laser pattern parameter and the standard laser parameter includes: when the maximum length of the actual laser lines is smaller than a first preset proportion of the length of the standard laser lines, determining that the tab is folded; or when the maximum distance between the actual laser middle faults is larger than a second preset proportion of the distance between the standard laser middle faults, determining that the lug is turned over.
According to a second aspect of the embodiments of the present application, there is provided a tab folding detection device, the device including: the image acquisition module is used for acquiring a shot image, and the shot image is obtained by shooting the pole piece and the pole lug under the irradiation of the laser generator; the image extraction module is used for extracting the laser pattern in the shot image to obtain an actual laser pattern parameter; and the tab folding determining module is used for determining whether the tab is folded or not according to the actual laser pattern parameters.
According to a third aspect of embodiments of the present application, there is provided a tab folding detection system, the system including: the laser generator is used for irradiating the pole piece and the pole lug to be shot and forming laser patterns on the pole piece and the pole lug; the camera is used for shooting the pole piece and the pole lug to obtain shot images of the pole piece and the pole lug; a controller for performing the tab folding detection method of any one of the first aspects.
Furthermore, the system also comprises an infrared filter, and the infrared filter is positioned in front of the lens of the camera.
Further, the laser pattern is a laser line, and the width of the laser line is less than or equal to 0.5 mm.
Further, laser generator is located the pole piece with directly over the utmost point ear, the camera is located laser generator's one side is used for it is right to be an angle the pole piece with utmost point ear shoots.
According to a fourth aspect of embodiments of the present application, there is provided an electronic apparatus, including: a processor; a memory for storing the processor-executable instructions; wherein the processor is configured to execute the instructions to implement the method of any of the first aspects above.
According to a fifth aspect of embodiments herein, there is provided a computer-readable storage medium, wherein instructions, when executed by a processor of an electronic device, enable the electronic device to perform the method of any one of the first aspects of the embodiments herein.
According to a sixth aspect of embodiments of the present application, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any one of the first aspects of embodiments of the present application.
The technical scheme provided by the embodiment of the application at least has the following beneficial effects:
in the embodiment of the application, through obtaining the shot image, the shot image is obtained by shooting the pole piece and the pole lug under the irradiation of the laser generator, the laser pattern in the shot image is extracted to obtain the actual laser pattern parameter, and according to the actual laser pattern parameter, whether the pole lug is turned over or not is determined. Through this application embodiment, can judge whether electric core utmost point ear is in the state of turning over a book through the data analysis that acquires to, can turn over a book to the utmost point ear and detect to whole electric core under the condition that is not influenced by illumination, and ambient light is backlight or all improves with efficiency to a great extent to the testing result when light.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application and are not to be construed as limiting the application.
Fig. 1 is a schematic flow chart of a tab folding detection method provided in an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a fly-cutting control system provided in an embodiment of the present application;
FIG. 3 is a schematic diagram illustrating operation of a fly-cutting control system provided by an embodiment of the present application;
fig. 4 is a schematic diagram of a standard laser parameter in a tab folding detection method provided in an embodiment of the present application;
fig. 5 is a schematic structural diagram of a tab folding detection device provided in an embodiment of the present application;
fig. 6 is a block diagram of an electronic device according to a tab folding detection method provided in an embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present application better understood by those of ordinary skill in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
It should be noted that, the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for presentation, analyzed data, etc.) referred to in the present application are both information and data authorized by the user or sufficiently authorized by each party.
In the prior art, tab detection is usually required in a given Region Of Interest (ROI) according to an image gray value, but the detection efficiency is low, and the detection effect in the prior art is easily affected by illumination conditions, and has a certain effect under backlight conditions, but the folding cannot be detected due to tab reflection under light conditions.
Based on this, the embodiment of the present application provides a tab folding detection method, as shown in fig. 1, the method includes the following steps:
step S101: acquiring a shot image, wherein the shot image is obtained by shooting a pole piece and a pole lug under the irradiation of a laser generator;
in this application embodiment, laser generator can launch laser to can be in the pole piece with form the laser pattern on the utmost point ear, then utilize the camera right the pole piece with the utmost point ear is shot, after forming the shooting image, not only can include the image of utmost point ear and pole piece in the shooting image, still can include the laser pattern.
Alternatively, the laser pattern may be various types of patterns, for example, lines, squares, rectangles, circles, and the like.
Preferably, the laser generator can emit line laser, so that laser lines can be formed on the pole piece and the pole lug.
Preferably, the width of the laser line can be set to be less than or equal to 0.5mm, so that the influence of the laser line on data can be reduced as much as possible on the premise that the laser line can be seen clearly.
In practical application, the laser generator and the camera can be fixed on a rigid body, and the positions of the camera and the laser generator are adjusted, so that the pole piece and the pole lug can be clearly imaged in the camera, and laser can irradiate the pole piece and the pole lug.
Preferably, as shown in fig. 2, the laser generator may be disposed directly above the pole piece and the tab, so that laser may be directed directly to the pole piece and the tab, and the camera may be disposed at one side of the laser generator, so that the camera may photograph the tab and the pole piece at an angle from a side of the laser generator.
Preferably, an infrared filter can be further arranged in front of the lens of the camera, so that light rays of laser emitted by the laser generator can be better imaged in the camera.
Step S103: extracting the laser pattern in the shot image to obtain an actual laser pattern parameter;
in the embodiment of the application, during normal operation, each frame of image can be collected, the laser pattern in each frame of image is extracted, and the actual laser pattern parameter of each frame of image is obtained.
In the embodiment of the present application, the laser pattern may be extracted based on an existing edge extraction algorithm, which is not expanded by the present application.
Step S105: and determining whether the tab is folded or not according to the actual laser pattern parameters.
In the embodiment of the application, whether the tab is folded or not can be determined only according to the actual laser pattern parameters, for example, the laser pattern is a square frame surrounded by laser lines, if the tab is not folded, the extracted actual laser pattern parameters should be a closed frame, and if the actual laser pattern parameters are non-closed frames, the tab can be determined to be folded. In the case of determining whether or not the laser pattern is a closed frame, the influence of the laser intermediate fault layer is not considered, that is, only whether or not the portion other than the laser intermediate fault layer is continuous is considered. In practical application, lines of the laser pattern can be thickened through a certain expansion coefficient to blur a laser middle fault part, and then whether the laser pattern is a closed frame body is judged.
Preferably, the actual laser pattern parameter may be compared with a standard laser parameter, so that whether the tab is folded or not may be determined more accurately.
That is, the determining whether the tab is folded according to the actual laser pattern parameter (i.e., step S105) may include: acquiring preset standard laser parameters; and determining whether the tab is folded or not according to the comparison result of the actual laser pattern parameter and the standard laser parameter.
In this embodiment, as shown in fig. 3, the standard laser parameter may be obtained by collecting and calibrating a standard pole piece in advance by a system formed by the camera and the laser generator, and taking emitted laser as line laser for example, the calibration process may include the following steps:
(1) extracting images of linear laser on a standard pole piece and a standard pole lug;
(2) calculating the total length LA of the line laser (i.e. the standard laser line length, as shown in FIG. 4);
(3) the maximum pitch value KA for the line laser intermediate faults (i.e. the standard laser intermediate fault pitch, as shown in fig. 4) is calculated.
Because the standard tab is not coated, but the standard pole piece is coated (as shown in the coating area in fig. 4), the height of the standard tab and the height of the standard pole piece are different, namely, the standard tab and the standard pole piece have a height difference, as shown in fig. 4, when laser is irradiated, the camera shoots from the side at an angle, and a fault is generated between the standard tab and the line laser on the standard pole piece.
In an embodiment of the present application, the actual laser pattern parameter includes at least one of: the standard laser parameters at least comprise one of the following parameters: standard laser line length and standard laser intermediate fault spacing.
Accordingly, in some embodiments, the determining whether the tab is folded according to the comparison result between the actual laser pattern parameter and the standard laser parameter may include:
and when the maximum length of the actual laser lines is smaller than a first preset proportion of the length of the standard laser lines, determining that the tab is folded.
For example, when the actual maximum laser line length is denoted as LB, if LB < LA × 0.8, (that is, the first preset ratio is set to 0.8, and of course, the first preset ratio may be adjusted, for example, may be set to 0.7, 0.85, and the like), it indicates that the tab is folded.
In other embodiments, the determining whether the tab is folded according to the comparison result between the actual laser pattern parameter and the standard laser parameter may include:
and when the maximum distance of the actual laser middle faults is larger than a second preset proportion of the distance of the standard laser middle faults, determining that the lug is folded.
For example, when the maximum actual laser middle fault pitch is denoted as KB, if KB > KA × 1.5 (i.e. the second preset ratio is set to 1.5, but of course, the second preset ratio may be adjusted, for example, may be set to 1.4, 1.6, etc.), it indicates that the tab is folded.
In this application embodiment, whether the battery core tab is in the turnover state or not can be judged by analyzing the acquired data.
Through detecting the positive pole of complete electric core and the utmost point ear of negative pole, the homoenergetic effectively detects out the pole piece of rolling over under different illumination conditions, and efficiency also improves by a wide margin.
In addition, in the embodiment of the application, the coefficient can be flexibly changed by calibrating the standard pole piece, and compared with the prior art, the method has universality.
In practical applications, the method of the embodiment of the present application can be applied to most of the apparatuses requiring tab detection in core making, including but not limited to lamination machines (cutting and stacking, thermal lamination, etc.), winding machines (EV, cylinder, welding, laser, etc.).
The embodiment of the present application further provides a tab folding detection device, as shown in fig. 5, the device may include:
the image acquisition module 510 is configured to acquire a captured image, where the captured image is obtained by capturing a pole piece and a tab under irradiation of a laser generator;
an image extraction module 520, configured to extract a laser pattern in the captured image to obtain an actual laser pattern parameter;
and a tab folding determining module 530, configured to determine whether the tab is folded according to the actual laser pattern parameter.
In some embodiments, the tab folding determination module may include:
the standard laser parameter acquisition submodule is used for acquiring preset standard laser parameters;
and the tab folding determining submodule is used for determining whether the tab is folded or not according to the comparison result of the actual laser pattern parameter and the standard laser parameter.
In some embodiments, the actual laser pattern parameters include at least one of: the standard laser parameters at least comprise one of the following parameters: the length of a standard laser line and the distance between standard laser intermediate faults;
correspondingly, the tab folding determination submodule may include:
the first tab folding determining unit is used for determining that the tab is folded when the maximum length of the actual laser line is smaller than a first preset proportion of the length of the standard laser line; or the like, or, alternatively,
and the second lug folding determining unit is used for determining that the lug is folded when the maximum distance between the actual laser middle faults is larger than a second preset proportion of the distance between the standard laser middle faults.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
The embodiment of the present application further provides a tab folding detection system, as shown in fig. 2, the system may include:
the laser generator is used for irradiating the pole piece and the pole lug to be shot and forming laser patterns on the pole piece and the pole lug;
the camera is used for shooting the pole piece and the pole lug to obtain shot images of the pole piece and the pole lug;
a controller for executing the tab folding detection method according to any one of the embodiments of the present application.
In this application embodiment, utmost point ear turns over a detecting system and can also include infrared filter, infrared filter is located the camera lens the place ahead of camera. In this way, the light of the laser emitted by the laser generator can be better imaged in the camera.
In this embodiment, the laser pattern may be a laser line, and a width of the laser line is less than or equal to 0.5 mm. Therefore, the influence of the laser lines on the data can be reduced as much as possible on the premise that the laser lines can be seen clearly.
In the embodiment of the application, laser generator is located the pole piece with directly over the utmost point ear, the camera is located laser generator's one side is used for it is right to be an angle the pole piece with utmost point ear shoots.
In a specific embodiment, as shown in fig. 2, the working process of the tab folding detection system may include the following steps:
(1) rigidly fixing the laser generator and the camera, and adjusting the positions of the laser generator and the camera to ensure clear imaging and enable laser to irradiate the pole piece and the pole lug;
(2) an infrared filter is additionally arranged on a lens of the camera;
(3) collecting and calibrating the standard pole piece, and extracting a standard laser pattern such as a standard laser line;
(4) calculating the standard laser line length LA and the standard laser middle fault distance KA of the standard laser line;
(5) when the detection or the operation is formally started, each frame of image is collected, the laser pattern in each frame of image is extracted, and the actual maximum length LB of the laser line of each frame of image is obtained;
(6) judging whether the condition of LB < LA 0.8 is met, if so, the test is not passed, namely, the pole piece is turned over; if the condition is not met, executing the step (7);
(7) acquiring the maximum distance of the actual laser middle faults as KB;
(8) judging whether the conditions of KB > KA 1.5 are met, if so, not passing the test, namely, determining that the pole piece is folded; if the condition is not met, the condition indicates that the pole piece is not folded.
That is, it can be determined that the pole piece is not folded only when the conditions LB < LA 0.8 and KB > KA 1.5 are not satisfied, and conversely, it can be determined that the pole piece is folded as long as either of the two conditions is satisfied.
With regard to the method and the structure in the above embodiments, the specific calculation manner and the specific structure have been described in detail in the embodiment of the tab folding detection method, and will not be described in detail here.
Fig. 6 is a block diagram of an electronic device, which may be a terminal, of the tab folding detection method according to the embodiment of the present application, and an internal structure diagram of the electronic device may be as shown in fig. 6. The electronic device comprises a processor, a memory, a model interface, a display screen and an input device which are connected through a system bus. Wherein the processor of the electronic device is configured to provide computing and control capabilities. The memory of the electronic equipment comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The model interface of the electronic device is used for communicating with an external terminal through model connection. Which computer program is executed by a processor to implement the method in the embodiments of the present application. The display screen of the electronic equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the electronic equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the electronic equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the configuration shown in fig. 6 is a block diagram of only a portion of the configuration associated with the present application, and does not constitute a limitation on the electronic device to which the present application is applied, and a particular electronic device may include more or less components than those shown in the drawings, or may combine certain components, or have a different arrangement of components.
In an exemplary embodiment, there is also provided an electronic device including: a processor; a memory for storing the processor-executable instructions; wherein the processor is configured to execute the instructions to implement the method as in the embodiments of the present application.
In an exemplary embodiment, a computer-readable storage medium is also provided, in which instructions, when executed by a processor of an electronic device, enable the electronic device to perform the method in the embodiments of the present application.
In an exemplary embodiment, a computer program product containing instructions which, when run on a computer, cause the computer to perform the method in the embodiments of the present application is also provided.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), synchronous Link (Synchlink) DRAM (SLDRAM), Rambus (Rambus) direct RAM (RDRAM), direct bused dynamic RAM (DRDRAM), and bused dynamic RAM (RDRAM).
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. A tab folding detection method is characterized by comprising the following steps:
acquiring a shot image, wherein the shot image is obtained by shooting a pole piece and a pole lug under the irradiation of a laser generator;
extracting the laser pattern in the shot image to obtain an actual laser pattern parameter;
and determining whether the tab is folded or not according to the actual laser pattern parameters.
2. The tab folding detection method according to claim 1, wherein the determining whether the tab is folded according to the actual laser pattern parameter includes:
acquiring preset standard laser parameters;
and determining whether the tab is folded or not according to the comparison result of the actual laser pattern parameter and the standard laser parameter.
3. The tab folding detection method according to claim 2, wherein the actual laser pattern parameters include at least one of: the standard laser parameters at least comprise one of the following parameters: the length of a standard laser line and the distance between standard laser intermediate faults; correspondingly, the determining whether the tab is folded according to the comparison result between the actual laser pattern parameter and the standard laser parameter includes:
when the maximum length of the actual laser lines is smaller than a first preset proportion of the length of the standard laser lines, determining that the tab is folded; or the like, or, alternatively,
and when the maximum distance of the actual laser middle faults is larger than a second preset proportion of the distance of the standard laser middle faults, determining that the lug is folded.
4. The utility model provides a utmost point ear turns over a detection device which characterized in that, the device includes:
the image acquisition module is used for acquiring a shot image, and the shot image is obtained by shooting the pole piece and the pole lug under the irradiation of the laser generator;
the image extraction module is used for extracting the laser pattern in the shot image to obtain an actual laser pattern parameter;
and the tab folding determining module is used for determining whether the tab is folded or not according to the actual laser pattern parameters.
5. A tab folding detection system, the system comprising:
the laser generator is used for irradiating the pole piece and the pole lug to be shot and forming laser patterns on the pole piece and the pole lug;
the camera is used for shooting the pole piece and the pole lug to obtain shot images of the pole piece and the pole lug;
a controller for performing the tab folding detection method as claimed in any one of claims 1 to 4.
6. The tab folding detection system according to claim 5, further comprising an infrared filter positioned in front of a lens of the camera.
7. The tab folding detection system according to claim 5, wherein the laser pattern is a laser line, and a width of the laser line is less than or equal to 0.5 mm.
8. The tab folding detection system according to claim 5, wherein the laser generator is located directly above the pole piece and the tab, and the camera is located on one side of the laser generator and is configured to capture the pole piece and the tab at an angle.
9. An electronic device, comprising:
a processor;
a memory for storing the processor-executable instructions;
wherein the processor is configured to execute the instructions to implement the tab fold detection method of any of claims 1 to 4.
10. A computer readable storage medium having instructions stored thereon that, when executed by a processor of an electronic device, enable the electronic device to perform the tab fold detection method of any of claims 1 to 4.
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| CN202210349221.4A CN114813745A (en) | 2022-04-01 | 2022-04-01 | Tab folding detection method, device and system, electronic equipment and storage medium |
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| CN202210349221.4A CN114813745A (en) | 2022-04-01 | 2022-04-01 | Tab folding detection method, device and system, electronic equipment and storage medium |
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